| 摘要: |
| ［摘要］ 目的 构建包含不对称摇椅弓的上颌矫治系统三维非线性有限元模型，为探讨不对称摇椅弓作用于牙列的生物力学机理奠定基础。方法 利用上颌骨及上牙列等CT扫描数据及托槽弓丝等实体数据，通过运行三维有限元分析等专用软件，建立包含上颌骨、牙列、托槽、不对称摇椅弓等在内的整体上颌三维非线性有限元模型。结果 建立了含不对称摇椅弓的上颌三维非线性有限元模型，包含160 514个单元和242 878个节点。结论 建立的有限元模型具有较高的仿真度和良好的几何相似性，为进一步探讨不对称摇椅弓矫治（牙合）平面偏斜时作用于牙列的力学机理提供了良好的研究手段。 |
| 关键词: 正畸 生物力学 上牙列 不对称摇椅弓 三维有限元分析 |
| DOI：10.3969/j.issn.1674-3806.2020.11.12 |
| 分类号:R 783.5 |
| 基金项目:广西医药卫生项目（编号：桂卫Z2015356） |
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| Construction of three-dimensional nonlinear finite element model of maxillary correction system with asymmetric rocking chair arch wire |
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ZENG Qing-yan, FANG Zhi-xin, ZHOU Yan, et al.
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Department of Orthodontics, the People′s Hospital of Guangxi Zhuang Autonomous Region, Nanning 530021, China
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| Abstract: |
| ［Abstract］ Objective To construct a three-dimensional(3D) nonlinear finite element model of maxillary correction system with asymmetric rocking chair arch wire, and to lay the foundation for further investigating the biomechanical mechanism of asymmetric rocking chair arch wire on the dentition. Methods Computed tomography(CT) scan data of maxilla and upper dentition, and the data of real items including bracket, arch wire and so on were used to construct a 3D nonlinear finite element model of the whole maxilla including the maxilla, dentition, brackets and asymmetric rocking chair arch wire through running special software such as 3D finite element analysis. Results The 3D nonlinear finite element model of maxillary correction system with asymmetric rocking chair arch wire was constructed. The model had a total of 160 514 units and 242 878 nodes. Conclusion The constructed finite element model has a high degree of simulation and good geometric similarity, which provides a good research method for further study of the mechanical mechanisms of asymmetric rocking chair arch wire acting on the dentition when the asymmetric rocking chair arch wire is used to correct the occlusal plane deflection. |
| Key words: Orthodontics Biomechanics Upper dentition Asymmetric rocking chair arch wire Three-dimensional finite element analysis |
